Classic pinball machine power switch safety cover
by apzpins · via Thingiverse
| Format | STL |
| Category | Art |
| License | CC BY-SA |
| Uploaded | Feb 27, 2026 |
⬇ 46 downloads
👁 37 views
Description
VERY IMPORTANT: POWER OFF AND UNPLUG THE GAME BEFORE INSTALLATION Classic pinball machines were made at a time with more relaxed electrical safety requirements. There are many models out there with completely exposed or at least badly shrink tubed terminals in the mains power switch. Many people keep the game manual or other paperwork in there and since half of the power switch terminals are powered even when the machine is off, there's a risk of getting electrocuted. This set of models is intended to be fitted in 60s, 70s and early 80s Williams and Gottlieb machines. The difference between the brands in the models are the screw holes and height of the cover. I encountered two different switch heights for Williams, so the short and tall models for the cover exist. The Bally model works at least for early Solid State models. The Bally version has normal and reverse version. In most games the power wires go towards back of the machine, but in some they are first routed towards the backbox, for which you have to use the reverse version. Print this out of wear and heat resistant materials, such as ABS or ASA. PETG might do the trick in a pinch. Adjust slicer settings so it'll print the 2mm thick walls as solid. Layer heights don't mean much. When installing, absolutely make sure you have unplugged the game from the wall socket. Unscrew the 4 screws that hold the power switch plate onto the cabinet. In Williams models where the grounding strap goes under one of the four screws, make sure it goes below the cover! In Gottliebs the cutout for the wires goes towards the backbox. In Williams I came across multiple different ways the main power switch was wired, so you may have to point the cutout towards backbox, right side or coin door. Verify that the screws are tight enough so the power switch plate feels secure.
Originally published on Thingiverse